38,414 research outputs found
Impossibility of the Efimov effect for p-wave interactions
Whether the Efimov effect is possible, in principle, for p-wave or higher
partial-wave interactions is a fundamental question. Recently, there has been a
claim that three nonrelativistic particles with resonant p-wave interactions
exhibit the Efimov effect. We point out that the assumed p-wave scattering
amplitude inevitably causes a negative probability. This indicates that the
Efimov states found there cannot be realized in physical situations. We also
restate our previous argument that the Efimov effect, defined as an infinite
tower of universal bound states characterized by discrete scale invariance, is
impossible for p-wave or higher partial-wave interactions.Comment: 3 pages, no figure; published versio
Phase Diagram of a Holographic Superconductor Model with s-wave and d-wave
We consider a holographic model with a scalar field, a tensor field and a
direct coupling between them as a superconductor with an s-wave and a d-wave.
We find a rich phase structure in the model. The model exhibits a phase of
coexistence of the s-wave and the d-wave, or a phase of an order competition.
Furthermore, it has a triple point.Comment: 13 pages, 10 figures; v2: figures and reference added, abstract
improved, some typos and expressions corrected, and published in JHE
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